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Ultrasonic needles and transducer assemblies formed of non-metal materials or a combination of materials
Ultrasonic needles and transducer assemblies formed of non-metal materials or a combination of materials
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机译:非金属材料或复合材料制成的超声波针和换能器组件
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摘要
A phacoemulsification needle includes a hub for connection to an ultrasonic handpiece. An elongated shaft is formed with the hub and extends from the hub. A distal end of the shaft breaks-up tissue when the distal end is caused to be vibrated by the handpiece. At least a distal portion of the shaft is formed of a material that has properties providing advantages compared to a metal needle. Example properties include a substantially lower density, a substantially higher electrical resistivity, a substantially lower thermal conductivity, a substantially lower mechanical lateral stiffness, a substantially higher efficiency of converting electrical energy powering the handpiece into motion of the distal end, a substantially lower acoustical impedance, a substantially higher Pois son's ratio, and a substantially higher mechanical gain.
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